Im*pla"ca*ble (?), a. [L. implacabilis; pref. im- not + placabilis: cf. F. implacable. See Placable.]
1.
Not placable; not to be appeased; incapable of being pacified; inexorable; as, an implacable prince.
I see thou art implacable.
Milton.
An object of implacable enmity.
Macaulay.
2.
Incapable of ebign relieved or assuaged; inextinguishable.
[R.]
O! how I burn with implacable fire.
Spenser.
Which wrought them pain
Implacable, and many a dolorous groan.
Milton.
Syn. -- Unappeasable; inexorable; irreconcilable; unrelenting; relentless; unyielding.
© Webster 1913.